00462nam a2200085Ia 4500008004100000245002600041300023500067650001700302856005700319170517s9999    xx            000 0 und d  aCrash Course: Ecology  aWith a solid understanding of biology, it's time for the long view - how the living things interact with and influence each other and their environments. Life is powerful, and in order to understand how living systems work, you...  xEnvironment.  uhttp://topdocumentaryfilms.com/crash-course-ecology/